title: Vertical interincisal trespass assessment in children with speech disorders.
abstract: Through a transversal epidemiological study, conducted with 333 Brazilian children, males (157) and females (176), aged 3 to 6 years old, enrolled in a public preschool, this study aimed to evaluate the prevalence of the different types of vertical interincisal trespass (VIT) and the relationship between these occlusal aspects and anterior lisping and/or anterior tongue thrust in the articulation of the lingua-alveolar phonemes /t/, /d/, /n/ and /l/. All children involved were submitted to a VIT examination and to a speech evaluation. Statistical significance was analyzed through the Qui-square test, at a significance level of 0.05 (95% confidence limit). The quantitative analysis of the data demonstrated the following prevalences: 1 - the different types of VIT: 48.3% for normal overbite (NO), 22.5% for deep overbite (DO), 9.3% for edge to edge (ETE) and 19.8% for open bite (OB); 2 - interdental lisping in relation to the different types of VIT: 42% for NO, 12.5% for DO, 12.5% for ETE, 32.9% for OB; and 3 - children with anterior tongue thrust in the articulation of lingua-alveolar phonemes in relation to the different types of VIT: 42.1% for NO, 14% for DO, 10.5% for ETE, 33.3% for OB. The results demonstrated that there was a significant relationship between open bite and anterior lisping and/or anterior tongue thrust in the articulation of the lingua-alveolar phonemes /t/, /d/, /n/ and /l/; and that there was a significant relationship between deep overbite and the absence of anterior lisping and anterior tongue thrust in the articulation of the lingua-alveolar phonemes.
authors.affiliation: Department of Orthodontics, University of São Paulo City, São Paulo, SP, Brazil. marcelosahad@terra.com.br
authors.forename: Marcelo de Gouveia
authors.initials: Mde G
authors.lastname: Sahad
authors.forename: Ana Carla Raphaelli
authors.initials: AC
authors.lastname: Nahás
authors.forename: Helio
authors.initials: H
authors.lastname: Scavone-Junior
authors.forename: Luciana Badra
authors.initials: LB
authors.lastname: Jabur
authors.forename: Eduardo
authors.initials: E
authors.lastname: Guedes-Pinto
mesh_terms: D001184:Articulation Disorders / Q000209:etiology; D001938:Brazil / Q000453:epidemiology; D016009:Chi-Square Distribution; D002648:Child; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008310:Malocclusion / Q000150:complications* / Q000453:epidemiology*; D024343:Open Bite / Q000150:complications / Q000453:epidemiology; D015995:Prevalence; D013062:Speech Articulation Tests; D013064:Speech Disorders / Q000209:etiology*; D014061:Tongue Habits / Q000009:adverse effects*